Novel mixed-voltage three-loop view tower

Abstract

The invention relates to a novel mixed-voltage three-loop view tower. The novel mixed-voltage three-loop view tower comprises a tower body, cross arms and suspension strings. The cross arms comprise a view cross arm, a middle-layer wire cross arm and a lower-layer wire cross arm. The view cross arm is arranged on the top of the tower body, cross arm units at two sides are arranged perpendicular to the line direction; the middle-layer wire cross arm is arranged under the view cross arm, cross arm units at two sides are arranged perpendicular to the line direction; the lower-layer wire cross arm is arranged under the middle-layer wire cross arm, cross arm units at two sides are arranged perpendicular to the line direction; the suspension strings are arranged on cross arm units at two sides of the view cross arm, the middle-layer wire cross arm and the lower-layer wire cross arm, and the view cross arm is of a three-layer horse head structure. Beneficial effects of the novel mixed-voltage three-loop view tower are that a 500 kV/220 kV left-right mixed-voltage arrangement tower head scheme is provided, compared with a 500 kV/220 kV top-bottom mixed-voltage scheme, the 500 kV/220 kV left-right mixed-voltage arrangement tower head scheme is advantaged in that the line load bending moment effect is effectively reduced, the size of the tower head is reduced, the nominal height of the tower is reduced, the 500 kV line and the 220 kV line operate horizontally in parallel in different windows, and the line operation and maintenance convenience level can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of high-voltage transmission lines, in particular to a novel mixed-voltage three-circuit landscape tower. Background technique [0002] At present, the existing conventional three-circuit transmission line adopts the arrangement of the upper circuit and the lower circuit. For the 500kV / 220kV mixed voltage line, due to the influence of conductor sag and electrical clearance, the distance between lines of different voltage levels is relatively large, increasing the The size of the tower head of the tower is increased. Since 500kV is located on the upper part of the tower body, the line load and bending moment effect of the tower is obvious, which intensifies the force on the tower and increases the consumption of tower materials. 500kV and 220kV are arranged vertically. When 500kV is overhauled, the 220kV line needs to be stopped, which increases the difficulty of operation and overhaul. Contents of the inv...

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Problems solved by technology

[0002] At present, the existing conventional three-circuit transmission line adopts the arrangement of the upper circuit and the lower circuit. For the 500kV/220kV mixed voltage line, due to the influence of conductor sag and electrical clearance, the distance between lines of different voltage levels is relatively large, increasing the Larger tower head size

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